Pressuremeter Test (PMT) Calculator
This calculator automatically evaluates:
- EM/PLN Ratio
- Soil Nature
- Soil Condition
- Density / Consistency
- Undrained Shear Strength (cu)
- Oedometric Modulus (M)
- Estimated SPT-N
EM / PLN Ratio = Menard Modulus / Net Limit Pressure
Calculated Results
EM / PLN Ratio:
Soil Nature:
Auto Detected Soil Condition:
Density / Consistency:
Selected αM Factor:
Oedometric Modulus M: MPa
Undrained Shear Strength cu: kPa
Estimated SPT-N:
Equations Used
M = EM / αM
cu = 0.67 × PLN0.75
EM / PLN > 12 → Cohesive Soil
7 < EM / PLN < 12 → Cohesionless Soil
7 < EM / PLN < 12 → Cohesionless Soil
Automatic Soil Condition Logic
| Soil Type | Condition | EM/PLN Ratio |
|---|---|---|
| Clay | Overconsolidated | >16 |
| Clay | Normally Consolidated | 9 – 16 |
| Clay | Weathered / Remoulded | 7 – 9 |
| Silt | Overconsolidated | >14 |
| Silt | Normally Consolidated | 8 – 14 |
| Sand | Overconsolidated / Dense | >12 |
| Sand | Normally Consolidated | 7 – 12 |
| Sand & Gravel | Overconsolidated | >10 |
| Sand & Gravel | Normally Consolidated | 6 – 10 |
Pressuremeter Test Diagram
Interpretation Note:
Higher EM/PLN ratios indicate:
- Stiffer soils
- Dense granular structure
- Overconsolidated conditions
- Lower compressibility
- Soft soils
- Loose structure
- Higher compressibility
- Weathered/remoulded conditions
Disclaimer:
This calculator is intended for educational and preliminary
geotechnical assessment only. Final engineering design should
be based on detailed site investigation and professional
engineering judgement.
This calculator has been developed based on Briaud (1992),
Baguelin et al. (1978),
and Menard Pressuremeter correlations.
References
- Briaud, J.L. (1992) — The Pressuremeter
- Baguelin et al. (1978) — Pressuremeter and Foundation Engineering
- Amar et al. (1991) — Pressuremeter Correlations
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